A Transportation Security Administration officer spotted the gun Tuesday morning as the bag was going through a security screening. It was the third firearm discovered during a screening at the airport this year.

The Des Moines Register says Michael Fendley, of Stratford, told authorities that he'd forgotten that the gun was in the bag and that he has a permit for it.Fendley was arrested on a charge of violating a screening checkpoint restriction. He's been released.

A phone listed for Fendley was not in service on Thursday. Online court records don't list the name of Fendley's attorney.

Gen. David Petraeus pleaded guilty to federal charges Tuesday to end a probe into whether he provided classified information to his mistress when he was CIA director, according to a U.S. official briefed on the matter.